Hi,I decided to order a pair of 38mm tubular wheelset from farsport and I must choose rim width between 20.5 mm and 23mm. The weight and price is the same. I'm going to use Veloflex Carbon 23c tubular tires on it.I don't know which one should I choose.Theoretically wider rim may be more stiff and also more aero due to equal width of tire, but I think there may be only myths.Morover, I'm not 100% sure that info from farsport about the same weight of both widths is true, bacause the logic says wider rims=heavier rims.Is there any sense in choosing 23mm wide rim?

I believe you want 20.5mm wide rims, I think the 23mm rims are for cross use. Not a tubbie expert, but I think the edge of the 23mm rim may strke the ground on hard cornering - don't quote me on that though. That said, Zipp firecrest tubbies are much wider than 23mm, for aero effect.

Strking the ground on hard cornering isn't any argument, because if it was possible then the leading manufacturers like zipp, hed, vision, bontrager or reynolds would never introduce their newest models of wheels with rim width 25-27 mm. What's more they wouldn't mount narrower 23-25 mm tubbies on that rims.

By rim width I mean the outer width of the rim measured between two sides of breaking surface. That isn't what defines the minimum tyre width you can mount on the rim, because it depends on inner rim width and in this case its around 15mm. It's obvious that I can't mount 14mm tyre, but e.g. 19mm tyre is ok. I saw 22mm tubbies on the 27mm wide bontrager aeolus.

My question was more about yours experiences/observations, bacause I already know that 23mm Veloflex Carbon easy fits to both type of rims. (20.5mm and 23mm).

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